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Let g(x) = log (f(x)) where f(x) is twic...

Let g(x) = log (f(x)) where f(x) is twice differentiable positive function on `(0,oo) ` such that `f(x+1)=xf(x)` then for `N = 1,2,3 and g''(N+1/2)-g''(1/2) = k (1+(1)/(9)+1/25+......+1/((2N-1)^2))` then 'k' is

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